Carpenter&#39;s plane



R. ALLEN.

CARPENTER'S PLANE.

APPLICATION FILED FEB. 3. 1920.

1,361,433 I Patented Dec. 7,1920.

. UNITED STATES PATENT ()FFICE.

RALPH ALLEN, 0F SHELTON, CONNECTICUT, ASS'IGNOB. TO THE ACME TOOL &MACHINE (30., 0F DERBY, CONNECTICUT, A CORPORATION.

CABPENTERS PLANE.

Application filed February 3, 1920.

17 0 all 10 710m it may concern:

Be it known that I, RALPH'ALLEN, a citizen of the United States,residing at Shelton, in the county of Fairfield and State ofConnecticut, have invented a new and useful Improvement in CarpentersPlanes; and I do hereby declare the following, when taken in connectionwith the accompanying drawings and the characters of reference markedthereon, to be a full, clear, and exact de scription of the same, andwhich said drawings constitute part of this application, and represent,in-

Figure 1. A view in side elevation showing my improved sheet-metalcutter-cap clamp as applied to a plane which is broken away except oneof the upstanding sideflanges of its body.

Fig. 2. A detached plan View of the cutter-cap clamp shown as mountingthe clamping-lever.

Fig. 3. A view thereof in central longitudinal section, the lever beingshown in elevation.

Fig. 4. A view of the clamp in transverse section on the line 4r-4: ofFig. 2.

Fig. 5. A broken plan view of the outer end of the clamp.

Fig. 6. An edge view thereof.

Fig. 7. A detached plan View of the clamping-lever.

Fig. 8. A View thereof in end elevation.

My invention relates to an improvement in carpenters planes and moreparticularly to cutter-cap clamps therefor, the object being to producea simple, durable, easily operated clamp of greater resiliency andtherefore more positive clamping action than the cast-metal clamps nowgenerally employed.

With these ends in view, my invention consists in a one-piecesheet-metal cutter-cap clamp adapted at its rear end to mount aclamping-lever and furnished upon its under face with a spring engagingwith the said lever to hold the same in place.

My invention further consists in certain details of construction andcombinations of parts as will be hereinafter described and pointed outin the claims.

In carrying out my invention, as herein shown, I produce from a singlepiece of sheet-metal, such as steel, a cutter-cap clamp 5 having at itsforward end a straight gripping-edge 6, and having its side edges turneddownward throughout its Specification of Letters Patent.

Patented Dec. '7, 1920.

Serial No. 355,938.

length to form corresponding side-flanges 7 and having its rear endrounded at the corners and turned downward to form a curvedbearing-flange 8. The rear end of the clamp is formed with alongitudinal slot 9 centrally intersecting the curved flange 8 andprovided for the reception of the shank 10 of the clamping-lever 11which is furnished with relatively large trunnions 12 offsetting fromopposite faces of its shank and with an operating-cam 13 forming anextension thereof. The respective trunnions 12 aforesaid have bearingupon the inner faces of the curved end-flange 8, at points on oppositesides of the slot 9 as shown in Figs. 2 and 3, and are held against thesaid flange by means of a spring 14: engaging with the cam 13 of thelever and welded or otherwise fastened to the lower face of the clamp,as at 15, at a point directly to the rear of the reduced rear end of thekey-hole slot 16 formed in the clamp for the reception of the screw 17by means of which the clamp is secured to the inclined cutter-support 18located between the upstanding flanges or cheeks 19 of the plane body orframe, which may be of any approved construction and is not shown. Thecutter 20 rests upon the said support 18. A cutter-cap 21 is placed uponthe upper face of the cutter and as so placed is directly interposedbetween the cutter and my improved cutter-cap clamp. The said spring 14is accommodated within the chamber 22 formed within the clamp by thedownwardly turned side-flanges 7 and the downwardly turned rear endflange 8 thereof.

In the use of my invention, after the cutter has been properly adjustedas to its cutting edge, the clamping-lever is forced downward from itsopen position, in which it is shown by broken lines in Fig. 3 into itsclosed position, in which it is shown by full lines in the said figure,as well as in Fig. 1.. As the lever is crowded downward into its closedposition, its cam 13 acts upon the upper face of the spring 1 1 andcrowds the same down upon the upper face of the cutter with which thecam itself makes no direct contact. As the clamping-lever is crowdedinto its closed position, as described, the cutter clamp yieldsthroughout its length and to a greater extent than any of the castironclamps heretofore used, the straight gripping-edge 6 of the clamp takingfirm hold of the forward end of the cutter, and

the spring 14 taking firm hold of the rear end thereof whereby thecutter is positively held against endwise movement.

By providing the clamping-lever with integral trunnions of relativelylarge diameter and holding the said trunnions in their bearings by meansof a spring, I simplify and strengthen the construction over thepivot-pin construction of the prior art, making the plane more durableand also making it easier to operate, as the larger the trunnions, theeasier it is to operate the clamping-lever.

I claim:

As a new article of manufacture, a onepiece, sheet-metal, cutter-capclamp for a carpenters plane, the said clamp having its side edgesturned downward throughout its length to form side-fianges, and havingits rear end turned downward to form a bearing-flange, and provided witha longitudinal slot centrally intersecting the said bearing flange,whereby the clamp is adapted to mount a clamping-lever, and the saidclamp having a lever-retaining spring secured to its inner face andlocated within the chamber formed by the said downwardly turnedside-flanges and downwardly turned rear end bearing-flange.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

RALPH ALLEN. Witnesses W. C. J. MAOALLER, WILLIAM F. HEALEY.

